package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void insert(SetmealDTO setmealDTO) {
        //添加套餐
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);

        //获取套餐id
        Long setmealId = setmeal.getId();

        //添加套餐的菜品关系
        List<SetmealDish> list = setmealDTO.getSetmealDishes();
        for (SetmealDish dish : list) {
            dish.setSetmealId(setmealId);
        }
        setmealDishMapper.insertBatch(list);
    }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id ->{
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus()== StatusConstant.ENABLE){
                throw new  DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(id->{
            //删除套餐中的数据
            setmealMapper.deleteById(id);
            //杉树套餐菜品关系表里的数据
            setmealDishMapper.deleteBySetmealId(id);
        });
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    @Transactional
    public SetmealVO getById(Long id) {
        SetmealVO setmealVO = new SetmealVO();

        Setmeal setmeal = setmealMapper.getById(id);
        BeanUtils.copyProperties(setmeal,setmealVO);

        List<SetmealDish> list = setmealDishMapper.getBySetmealId(setmeal.getId());
        setmealVO.setSetmealDishes(list);

        String categoryName = categoryMapper.getNameById(setmeal.getCategoryId());
        setmealVO.setCategoryName(categoryName);

        return setmealVO;
    }

    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //修改套餐表
        setmealMapper.update(setmeal);

        //获取套餐id
        Long setmealId = setmealDTO.getId();

        //删除套餐和菜品的关联表
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> list = setmealDTO.getSetmealDishes();
        list.forEach(setmealDish->{
            setmealDish.setSetmealId(setmealId);
        });
        //重新插入套餐和菜品的关联数据
        setmealDishMapper.insertBatch(list);
    }

    /**
     * 套餐起售停售
     * @param status
     * @param id
     */
    @Override
    @Transactional
    public void updateStatus(Integer status, Long id) {
        //起售套餐时,判断套餐里的菜品是不是有停售的
        if (status==StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if (dishList!=null&&dishList.size()>0){
                dishList.forEach(dish->{
                    if (dish.getStatus() == StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        //修改套餐数据
        Setmeal setmeal = Setmeal.builder()
                .status(status)
                .id(id)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
